1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c672b28d69bba3bf1f354ea40cf6d97db88fc22fa6ed8b4546f545615fe435. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f1c783-51ae-43c9-9547-87b0496cf78d.json and https://artists.proofprofile.net/proofs/artist/f4f1c783-51ae-43c9-9547-87b0496cf78d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dbbaa628b99dd58b097b89a1078c0b7d8d7dad36af926bc386b3c7c71aada9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6633fa5c10ec492e0cf1d445f886aaaa978060b68b87702ce128c8bfe69dfd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8bd9fd91d432b480a11d52f5fdb9263cc9edb984e4a3f3edfc180276192e6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8fe845db3e2b1b8cc8c7edb8478c9094bf048a96ae41f6337cb99797ec581f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573ebd2ce8c9b12b93b321c4857d8624c478734e5097c0ae79ea435ee72561b4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e5a5463044eaa9d4cfe5c75c74dbab94bbfbac67104d49d51601d6333382c6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49556eac658246f5166be70c07ddc370916037e3028abb4097a0f96b9f63fa43. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58adf161548038d09c28e79a94355cb95b32f91f5a77aae449d48f8f1f763f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a15ec0d1cad9329adae3f55268fd41fb18b10f4c297f834a93279bf6ab9923. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741504008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb814466faba48431e6f1cfabfb90bdd1495a7c22d7d7e95ff59214108822572. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1595203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d32b4628c382fafecd2915d4b0ee81b423f2a9c16647cda012605b8ff25a2. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1674612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40e5b7ed931dd046008063f9e0d4e8356e0dbedda8c1e28da68f4af72a2b864. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ1417222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7dd984ef02dbb10121c6b86f80c022a4a42040fd82153f5d430380000da930. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741407676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e7f40cf62cd73bfd606b389c7fe0869ac1c6b68e03a6a085f4277de548766e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH741509142.
Compilation of Anniversary - 3 Years of Digiment